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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Appearance / physical state / colour

Currently viewing:

Administrative data

Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: A Klimisch 2 reliability score was assigned since data are based on a reliable handbook.

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Physical Constants of Inorganic Compounds
Author:
Lide DR
Year:
2009
Bibliographic source:
CRC Handbook of Chemistry & Physics, 89th Edition CRC Press
Reference Type:
other: EU RAR Sodium Hydroxide
Title:
European Risk Assessment Report Sodium Hydroxide
Author:
European Communities
Year:
2007
Bibliographic source:
EUR 23040 EN, Volume 73

Materials and methods

Principles of method if other than guideline:
No data
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Sodium hydroxide
EC Number:
215-185-5
EC Name:
Sodium hydroxide
Cas Number:
1310-73-2
Molecular formula:
HNaO
IUPAC Name:
sodium hydroxide
Details on test material:
- Name of test material (as cited in study report): sodium hydroxide, caustic soda

Results and discussion

Physical state at 20°C and 1013 hPa:
solid
Form / colour / odour
Form:
other: hygroscopic
Colour:
white
Odour:
other: It has no specific odour
Substance type:
inorganic

Applicant's summary and conclusion

Conclusions:
At room temperature sodium hydroxide is a white orthorhombic crystal and is hygroscopic. It has no specific odour and it is an inorganic substance.